Rapper Jay-Z’s 40/40 Club owes thousands of dollars for construction work, furniture and lighting it never paid for, according to lawsuits.

Three contractors claim the 40/40 Club hard-knocked them after they helped service the West 25th Street hot spot before its June debut, according to documents obtained by the Web site The Smoking Gun.

Two of the companies, Ameribuild Construction Management and Ronald Mark Associates, have since filed lawsuits against Twenty Ones Inc., which does business as the 40/40 Club, the site said.

Ameribuild, a Manhattan-based firm, claims that Twenty Ones owed $8,114.59 plus interest for services and materials, such as lumber and wallboard, the site said.

The other firm, Ronald Mark Associates, contends it was given a down payment of $5,420 for 30 custom-made tables, that Twenty Ones bounced a check for $6,500 and that the club owes $13,108 more, the site said.